BEULAH, Mich. — A small town had a big mess. Baby wipes clogged the wastewater system in Beulah in northern Michigan, causing a backup of 10,000 gallons of human waste from a manhole. The spill was on the grounds of the village’s wastewater treatment plant. Superintendent Brady Streeter says it was cleaned up within a few hours. The state environment department says wipes are a “recurring problem” for sewers and septic systems. Indeed, in May, Macomb County in suburban Detroit said it had been removing 4,000 pounds of wipes a week at one pump station.